| 摘要 |
<p>PURPOSE:To attain the coordinate input while the locus of a position indicator is confirmed with a visual observation by overlapping a pair of a display device for displaying coordinates and a back light to the upper part of a sense part, and constitut ing a tablet. CONSTITUTION:The pair of a display device 5A for displaying coordinates and a back light 5B to irradiate a display device 5A for displaying coordinates from the lower direction is overlapped on the upper part of a sense part 4, a tablet 1 is constitut ed together with the sense part 4. Namely, by providing a display device 5 for displaying coordinates at the upper part of the sense part 4, a position indicator 60 is not approximate to the sense part 4, an alternating signal from the sense part 4 passes through the display device 5 for displaying coordinates, the position indicator 60 receives it and the signal is tuned and transmitted. Respective sense parts 4 can receive and coordinate-input as the alternating current signal of the level in accordance with the distance with the position indicator 60 and the moving locus of the position indicator 60 is brightly displayed by the transmitting type the display device 5 for displaying coordinates. Thus, the position detection, in which the position indicator 60 cannot be connected to anywhere, has good operability with high accuracy, can be obtained.</p> |
